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G. W. COFFN.

ABRADIN-G AND POLISHING MAOHINE POR BOOTS AND SHOES. No. 274,440.

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UNITED STATES PATENT Ormes,

GEORGE W. OOFFIN, OF LYNN, MASSACHUSETTS, ASSIGNOR OF THREE- FIFTHS T0 HERMAN BEHE, OF NEW YORK, N. Y.

ABRADING AND POLISHiNGlVl-ACHINE FOR BOOTS AND SHOES.

SPECIFICATION forming part of Letters Patent No. 274,440, dated March 20, 1883.

Application filed February 4, 1882. (Model.)

To all whom it may concern:

Be it known that I, GEORGE W. COFFIN, a citizen of the United States, residing at Lynn, in the county of Essex and Commonwealth of Massachusetts, have invented certain new and useful Improvements in Mechanism for Abrading and Cleaning or Polishing the Soles of Boots and Shoes, of which the following, taken in connection with the accompanying drawings, is a specication.

The invention relates to mechanism forabrading and cleaning or polishing the soles oi" boots or shoes. It is specially adapted to operate upon the face of the sole; and it consists in the peculiar construction and arrangement and the various combinations of the operative parts, all substantially as described.

-I n the accompanying drawings, Figure l is a plan view of the entire machine. Fig. 2 is a side elevation of the machine, made partly in section. Fig. 3 shows the opposite side elevation of the entire machine. Fig. 4 is a perspective view of the abrasive tool. Fig. 5 shows a sectional view of said tool attached to its carrying-shaft.

Upon the column A is a hollow shell or casing, B, which is provided with an exhaustpipe, O, and also a hollow arm, D, at the end of which rod is a bonnet, Gr, adapted to receive the cleaning-brush E, and on the top of the arm D is a horn, F, that reaches upward toward the abrasive tool, as shown in Figs. 2 and 3.

The end shell or casing, B, is composed of two annular chambered plates, attached together in the usual manner, seas to form an interior chamber suitable for the reception of an exhaustnheel.

The wheel is and may be of any usual construction common to exhaust-fans, so that it will draw a strong current of air through the horn F and arm D, in the direction of the `arrows thereon, into the center of the said casin g B. The air and leather dust are sucked into the horn, and are by the operation of the fan discharged from the casing LB` through the exhaust-pipe C.

The shaft c of the fan has at one end a pulley, e, which is connected by belt b with a driving-pulley, d, through which means the fau is made to revolve. Said pulley d is fixed on one end of a shaft,f, that, extend in g through the column c, carries on its opposite end the pulleys Il., t, k, and fm. The pulleys h and are designed to receive the driving-power of the machine, and are arranged one fast, the other loose, in .the usual manner, for that purpose. The pulley m' connects by the belt n with the pulley p, so as to revolve the pulley p on its journal-pin q. Said pulley p is provided with a wrist-pin, 1', to which is attached one end of a rod, S, the opposite end ot' which is jointed to the carrier arm t. Said carrier-arm t is journaled ou a pin, w, that projects from the arm D', and has in its opposite euda hole or socket adapted to receive theshanl; or tang ot' the finishing-brush. Said brush is retainedin connection with the carrier-arm t by means ol"Y the piu W, and is caused to vibrate in an obvious manner by each revolution of the pulley p.

Extending upward from the casing B are two vertical ears, 3 and 4, in which is journaled a horizontal shaft, 5. Said shaft 5 carries a 'fixed plate, 6, and two fixed pulleys, 7 and 8. Motion is imparted to the shaft by belt 9, that connects the pulleys 7 and la. The pulley S connects by belt 10 with a pulley, H, iixed upon one end of a horizontal shaft, 12, that is journaled in the end of the arms. Said shaft 12 carries a cleaning-brush, E, which is *provided with a hole or socket in its bottoni end to receive the shank or. tang of the abrasive tool, which thereby receives a vibratory motion. v

The abrasive tool is given the conformation substantially as shown in Fig. 4. lt is preferablycomposed of two blocks, 20, a cornerpad, 22, and tang 24, all of which are united, as shown in Fig. 5. The central block, 26, is composed of felt.

Said crank is arranged to IOC The tang 24 is cast with a disk, 23, on one end, and is secured to the block l26 by bolts 21, that pass fromthe block up through the disk 23, as shown in Fig. 5. The ends of block 20 are composed of rubber. They are secured to the central block by means of glue, and they are each provided with a horizontal groove, 27. Said grooves are intended to receive narrow strips or tongues, which have one end hinged to the block, so as to swing outward, as shown in Fig. 5, and are provided with brads on the inner side, which pierce the abrasive material as the tongue goes into the groove, so as to strain and draw the material about the tool, as referred to hereinafter. The tongue, when pressed fully into the groove, is locked therein by a spring-bolt, 40, which slides over the end of the tongue in an obvious manner, and prevents the tongue from swinging outward till the said catch-bolt is moved back. The pad 22 is composed of felt or a similar exible substance softer than the central block, 26. It practically covers the entire bottom surface of the foot, being attached thereto by means of glue. It is convex on its bottom face, and forms a soft yieldingbacking for the abrasive brush. This brush consists of. a piece of cloth or other fibrous material, covered on 1ts under side with tine emery, or with glass or other equivalent abrasive material. It is placed on the foot with its back in contact with the pad .22, its edges bein g drawn up around the foot, so as to stretch and tit it closely to the pad 22, whereupon the tongues25 are pressed into the groove 27, so as thereby to force the edges of the cloth into the groove 27 and hold it strained tightly about pad till Worn out by use, when it is removed and a new piece substituted for it.

In one class of sole-cleaning machines the abrasive tool is an annulus or disk, which is revolved continuously in only one direction.

' In another class of machines the abrasive tool is an endless belt, which is also moved continuously in only one direction.

In my invention the abrasive tool is given a vibratory motion, so that any bers which escape the movement of the tool in one direc tion must certainly yield to the movement thereof in the reverse direction. yThis vibratory movement of the abrasive tool is a much closer imitation of the movements of the human hand, and it enables the tool to cut the fibers of the leather much closer, and thereby brings out the iinesttexture of the leather, so as to give the sole a hard solid finish. This finish may be greatly enhanced by the introduction of a hard-nish brush into my machine.' This brush is also preferably given a vibratory movement, as before described.

Having thus described my inventiomwhat I claim is- 1. The combination of the disk 6, the connecting-rod 14the 'crank l5, and the abrading-tool attached to the crank, having a vibrating movement in opposite directions, substantially as described.

2. A machine for abrading and finishing the Itially as described.

In testimony whereofI have signed this specitication.

GEORGE W. COFFIN.

In presence of- WILLIAM T. GRAY, C. B. TU'rfrLE. 

